4Th Grade Math

Front 1

Parallel Lines

Back 1

two lines that are always the same distance apart and never touch
l l

Front 2

Perpendicular Lines

Back 2

two lines that intersect at right angles
+

Front 3

Right Angle

Back 3

an angle that is equal to 90 degrees
L

Front 4

Perimeter

Back 4

the distance around a shape

(add up all the sides)

Front 5

Hexagon

Back 5

6 sided polygon

Front 6

Pentagon

Back 6

5 sided polygon

Front 7

Parallelogram

Back 7

a quadrilateral with opposite sides being parallel and equal in length

Front 8

Rounding

Back 8

Changing the value of a number to make it easier to write and solve

(Find your place, look next door, 5 or higher add one more)

Front 9

Fraction

Back 9

A part of a whole or one

(for example 4/6)

Front 10

Trapezoid

Back 10

A quadrangle with one pair of parallel lines

Front 11

Pictograph

Back 11

a graph that uses pictures or symbols to show numbers

Front 12

Line Plot

Back 12

Uses x's to show the amount on a number line

Front 13

Acute Angle

Back 13

An angle that is less than 90 degrees

Front 14

Obtuse Angle

Back 14

An angle greater than 90 degrees and less than 180 degrees

Front 15

Fact Family

Back 15

A set or group of facts that go together

7 X 5 =35, 5 X 7 = 35, 35 / 5 = 7,

35 / 7 = 5

Front 16

Estimate

Back 16

Use rounding to find a quick answer that is close to the exact answer

(for example: 11 x 29 is close to 10 X 30, which equals 300)

Front 17

Numerator

Back 17

The number above the line in a fraction and it tells you how many equal parts you have.

Front 18

Denominator

Back 18

The number below the line in a fraction and it tells you how many equal parts it takes to make ONE or a WHOLE.

Front 19

Straight Angle

Back 19

An angle that measures exactly 180 degrees

Front 20

Clockwise

Back 20

Turning the same direction as the hands on a clock

Front 21

Counterclockwise

Back 21

Turning the opposite direction as the hands on a clock

Front 22

Congruent

Back 22

Having the EXACT same Shape and Size (rotation, translation or reflection do not change congruency)

Front 23

Number Sentence or Equation

Back 23

Must have NUMBERS and OPERATION SYMBOLS:

example: 25 + 25 = 50

Front 24

Rotation

Back 24

To turn or spin in a clockwise or counterclockwise direction

Front 25

Translation

Back 25

To just move or slide in one direction

Front 26

Reflection

Back 26

The flipping of a shape over a line of reflection to make a mirror image

Front 27

Equivalent Fractions

Back 27

Fractions that are the SAME value or amount
For example: 1/2 = 2/4

Front 28

Mixed Number

Back 28

A number that has BOTH a whole number and a fraction
For example: 5 1/4 or 3 1/2

Front 29

Improper Fraction

Back 29

A fraction that has a Numerator that is equal to or bigger than the Denominator
For example: 3/2 or 10/5

Front 30

Area of a Rectangle or

Parallelogram

Back 30

The space inside a shape or polygon. It is measured in square units. Base x Height = Area

Front 31

Area of a Triangle

Back 31

The space inside a shape or polygon. It is measured in square units. (Base x Height) / 2 = Area

Front 32

Rhombus

Back 32

A parallelogram with all sides equal in length

(it can be a square)

Front 33

Acute Triangle

Back 33

A Triangle with all Acute angles

Front 34

Right Triangle

Back 34

A Triangle with one Right angle and two Acute angles

Front 35

Obtuse Triangle

Back 35

A Triangle with one Obtuse angle and two Acute angles

Front 36

Tenths

Back 36

Equal to 1/10 of One Whole (Think of dimes)

For Example: 0.1

Front 37

Hundredths

Back 37

Equal to 1/100 of One Whole (Think of pennies)

For Example: 0.01

Front 38

Venn Diagram

Back 38

Uses circles to show how things are alike and different (compare/contrast)

Front 39

Timeline

Back 39

A line that shows dates in order - the more years between dates, the bigger the space

Front 40

Symmetry

Back 40

A shape that has identical halves